Reamer



E. P. SCHONK.

RE'MER.

` APPLICATION FILED ocr. I5. Isla.

2 SHEETS-SHEET I.

1,328,208. Patentd Jan. 13,`l920.

III IlIlIlIlIIIIIIIIIIIIIIIIII! E.P. scHoNK.

REAMER. APPLICATION FILED O CT. I6. 1918.

Patented Jan. 13,1920.'

2 SHEEI'S*SIHEET 2.

lIIIIIlIl IIIIIIIII Z6 l Z5 26 UNITED sTArEsrATENr,OFFICE f,

EDWARD 1. scHoNK, or WILKEs-BARRE, PENNSYLVANIA.

BEAMER.'

To all 'whom z't may-concern:

Be it known that I, EDWARD P. SCHONK.A a citizen of the United States, residing -at Wilkes-Barre, in the county. of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Rea1n-` ers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to 'make and use the same.

This invention relates to drilling and boring apparatus and more particularly to a tool for simultaneously threading and reaming the end of a pipe or other tube.

It is wellv known that whenppipes or tubes are circumferentially cut or threaded that there is a tendency toward the formation of an internal bur or inward turning of the metal so that there is a measurable reduction of size of the passage at that point which materially reduces the capacity. of flow due to loss of area through the pipe or tube.

It is one of the objects of the present invention to provide a simple hand or otherwise driven tool whereby the bur or inwardly turned portion of the end of the tube or pipe may be reamedpractically simultaneously with the cutting or threading of the end of the pipe or tube.

A further'ob]ect of the present invention is to provide means readily attachable to the usual or ordinary form of die-stocks'or other cutting tools commonly usedlfor cutting or threading tubes or pipes and especially to provide for such an attachment without substantial change, alteration, or work being necessary to render the` attachment applicable to the usual die-stock or cutting device upon which the attachment may be applied.

Another Object of the present invention is vto provide a reamer having a very large range of capacity for use lin conJunctlon with die-stocks or cutting devices whereby tubes or pipes of various sizes may be simultaneously cut or threaded and reamed without requiring the interchange of reaming attachments for die-stocks.

A further object contemplated by this invention is to provide for the disengagement of the reamer or reaming tool which is used in the device from Contact with the pipe or tube which is being reamed when the cutting and reaming operation -has been completed and it is desired to reverse the direc.,-

tion of rotation of the cutting device ordiestock in the removal4 of the latter from the pipe or tubeand thus to protect 'and .pre-

serve the cuttingedges of the reamer from unnecessary wear owing to engagement of the edges of the reamer with thereamed surface during the. removal of the device from position on the pipe.

With these and other objects in view, as will be apparent to those skilled in the art, the present invention consists in thefn'ovel construction and arrangement of the parts, the combination of the parts, and any details of constructionof the device as will be more particularly hereinafter set forth and a preferred embodiment of which is illustrated in the accompanying drawings, in which,-

Figure l shows my improved reamer attachment in combination with an ordinary form of die-stock in which thecutters are arranged adjacent the upper face of the body of the die-stock, the view being a central vertical'section through the apparatus,

for locking the stem in disengaged position during the backing offor removal of the de-` vice from the pipe.

Fig. 4 is a cross-section on line i--c of Fig. l. v

F igs. 5, 6 and 7 show another form of the reamer attachment.

InFigs. l and Qthere is conventionally represented different forms of standard or well known die-stocks A and B respectively, which are provided with usual thread cutters C which, when the die-stock is fitted to the end of the pipe or tube to be cut or threaded and revolvrs, operate to produce external threads on the pipe or tube D and sometimes during. this process, and sometimes during `the cutting of the pipe or tube into sections, the ends of the latter become burred or inwardly turned and thus y Specification of Letters Patent. Patented J an. 13,' 1920, Application filed October 16, 1918. Serial No. 258,770. i

materially reducev the area ofthe pipe and interferes with the flow. Sometimes this bur is removed by a subsequent operation after the threading or cutting of the pipe and it one size of which is capable of being applied` to various forms and sizes of well known die-stocks without material change or alteration to the latter, and one embodiment of the invention is shown inwhic'h there is provided a1 substantial U-shaped yoke 2,hav-

-ing outwardly divergent terminals 3fprovided with holes 4 arranged at suitable points in the flanges 3 to enable the fastening-of the yoke 2 tothe die-stocksAA or B by screws or bolts 5, or other suitable fastening means which may be applied to tapped or other holes with which the. die-stock may be ordinarily provided for other purposes,` for instance, to receive the screws which retain the die-holding caps or plates to the body of the die-stock. The yoke 2 is applied in inverted position to the die-stock .and fastening thereon and has at its upper end a central socket or guide portion 6 of suitable length, having a bore 7 preferably of polygonal cross-sectional outline to receive the stem 8 of the reamer 9, the stem being of similar cross-sectional form to the bore 7 of the socket 6 and slidably 'itted therein so that the reamer 9 is held against relative rotation in the socket 6 and therefore when the reamer and its mountings have been applied to a die-stock, and the latter turned, the driving power will be transmitted to the reamer and it will operateito cut\or ream the end of the pipe or tube D when the latter is engaged-by the reamer.

It is one of the important objects of the present invention to provide a reamer attachment for die-stocks which is not only readily attachable to divers forms of well known die-stocks, but it is the further object to provide a reamer which has the capacity of operating successfully when adjusted upon the various forms of die-stocks and can-be used to ream a large range of size of pipes or tubes. To that end, in the form of the invention herein illustrated, the j upper end of the reamer stem 8 is shown as externally `threaded at l0 and engages a sleeve 11 having a threaded end 12. The sleeve 11 provides, substantially, a handle and guard for the stem 8 of the reamer 9 where it projects above the upper end of the socket 6 of the yoke 2, and the lower end of the sleeve is normally pushed downwardly in to yielding contact with the socketiend by means of an expansile spring 13j which serves to hold theJ reamer 9 projected inwardly through the yoke 2 and in th eentral chamber of the die-stock A. toyieldingly engage the adjacent end of the tube Y In operating -the apparatus, the positionl of the reamer 9 may be nicely predetermined 'through the means of the threaded sleeve 11 which can be adjusted alongthe threaded portion l0 of the reamer stem 8 to determine the relative position of the', reamer 94.tov the die-stock A and the yoke 2.

'To further increase they range of adjustment and the adaptability of the reamer to.

different types of die-stocks and'for reaming differentsizes of pipes, the handle 11 is shown as provided'with thethreads 12 .at-

one end and is therefore reversible so that the threads) may be positioned away from the socket/upon the yoke as 'inFigz 1, or'the threaded end ofthe handle or sleeve may bel disposed in position adjacent to the end of the socket 6. In the latter Ainstance the reamer 9 can be lowered well into 'the body of the die-stock A, as when the threaded cutters are located below the top surface of the die-stock, and in the first instance, or when the handle 11 is reversed, the upper end of the stem 8 would be engaged by the threads 12 and the reamer 9v-held in a rela-1Al tively elevated position in the die-stock.A

By mountmg the fastening device for upon the socket portion of the yoke, this disengagementmay. be effected Without changing the relative adjustment of the reamerand its sleeve or adjusting member.

A further valuable feature of thel present invention resides in the provision of means for maintaining the cutting edges of the reamer 9 clear of the end of the pipe or tube D after the latter has been reamed and Vholding the reamer in disengaged position during the backing off of the apparatus@ Suitable means may be adapted for this purpose, one form .of which is shown in this' instance as comprising a set-screw 14 threaded in the socket 6 and adapted to be setup against ,the shank 8 when the latter has been lightly pulled upwardly to `raise the reamer 9 from the seat it has cut inthe pipe D when rotated by the diestock. Afterthe reamerV has been adjusted clear of the pipe the die-stock may be turned ofi the pipe without the threads ofthe reamer being engaged and unnecessarily worn 4by reason of v contact of the reamer with thempipe.

From the foregoing it will be seen that I have provided a yery simple and substantial form of reaming attachment for combination .with die-stocks of various forms v and which is capable of use upon a large range of sizes of pipes-or tubes and pro-I vides for the protection of the reamer edges. It will be obvious that various changes in saiy..tot'urnthe adjusting :member 11 until size and proportion 'of the apparatus may be l resorted to within-the skill of those skilled in the art Without departing from the scope of the invention and within the -1imits o' the 'appended claims..

For ,faciiieitingA and. 'ealedaing lthe ad! justment of the reamel. head-9 on the diestockt- 0, .operate upontubesor pipes of df- AferentIdiarneteis,'suitable indicating means may be'- .piovidecL' In the' 4form illustrated one of the 'side facets of .the shank 8 of the reaxner'head 9 is provided as shown in Fig.

1 With'a series of graduations 8a suitably in dexed to' indicate-the proper adjustment of" the reamer for agiven sizeof pipe. To dis# tinguish between the fsmaller sizes of pipe and the largersizesof pipe upon' whichthe tool may be adjusted to 'operateanother of the facetsg of-the' stem 8.ma`y .be provided with. aseri'es of gra'duations'Sb indicated indotted. lines infFig. 2, lthese graduations being formedon 'one -of theA faces of-l the gloovedside 8c of the stem, the gro ove'be ingshown 1n'. the cross sectional detail,- Fig.

4. T'oadjus'tthe reamer it issiniply necesthe 'proper index graduation.- is brought intov register with a.convenient fixed -mark orsighting edge on the' yoke structure to ob tain the proper positionlofthe reamer head-.

In Figs. 5 to '7 'thereis shown another form of the 'invention in which the'yoke 20 is provided'with laterally extending llugs 23 between the inner ends-of which below the body of tliey'o'kethere is provided a'chamber 21 into'which 'the reamer9be retracted through means of alnut 24 'suitably mounted in aperture 25,-' in the head4 of the yoke, this nut engaging the threads-2`6-which are formed on the. corners of' apolygonal bush-ing 2 7`,sl idably vfitting acomplementary axial chamber'or borel 28 formed to receive v the same in' the head of the yoke. The bushingis provided with linternal threads 29 at its upper endto receive the'threaded part 30 of the stem 31 'of the reamer 9, the threads 30 on the stem beingpitched oppositely to unscrewing of the 'reamer 29 from the bushi ing whenv thel reainer -is utilized in cutting the threads of the nut'24 so as toprevent thel the interior of pipe D for instance as shown finFigs. 1 afnd.v It vwill be'seen that the form of the invention asfshown in Figs. 5,

'6 and 7 provide 'for' ample longitudinal or4 axial adjustment fofthe reamer 9 into the.

Work being cut and-enables. the 'use of' the deviceC on pipes .of variousdiameters. Moreover thisform of the device 1s slmple 1n ad-A justment and-operation. :It 'is practicable and' inexpensive as tocost of construction as4 it consists of but four very simple' elements.

What I claim as new is i ,x .l

1. The combination- With a die-stock, of a reaming. attachmentf,comprising a' yoked bearing membenconnectible to the die-stock and a reaming tool, slid'ably mounted therein, said tool having a square steml portion -and a Athreaded stem'portion, and a handle the htool in disenvaging position .to permit theapparatus to e removed-from the Workwhile the reaming tool is removed from con'- tact therewith.

2.. A die-'Stock having, Ain cambiamo@ a* reamer having a square stem alined'with the axis ofthe die-chamber and reduced and' lthreaded at its upper end,"a yoke detachably Acnnecnedto thedie-stock and in which the squarestem of,said reamer is mounted, an

expansionspring intermediate said reamer and yoke,.a.nd a reversible handle adjustable along the Ithreaded portion of said stem to vary theposition ofthe tool relative to-fthe I die-stock, one end of said handle having' a bore'l adapted to receive said. square stem.'

In testimony whereof I aiiXJny signature.

- EDWARD P. soHoNK. 

